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Electromagnetic Field Theory
A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be
113.04 μH.
37.68 μH.
3.768 μH.
1.1304 μH.
113.04 μH.
37.68 μH.
3.768 μH.
1.1304 μH.
Answer
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Related Question
Electromagnetic Field Theory
Which of the following statement regarding waveguides is incorrect?
Waveguides can handle large power at UHF and microwaves
At waveguide can be coupled to a coaxial cable
At frequencies below the cut off value the wave progresses across the waveguide after total reflections
Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves
Waveguides can handle large power at UHF and microwaves
At waveguide can be coupled to a coaxial cable
At frequencies below the cut off value the wave progresses across the waveguide after total reflections
Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves
Answer
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Electromagnetic Field Theory
As a result of reflection from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater than the velocity of light in space. This is called the
normal velocity.
velocity of propagation.
group velocity.
phase velocity.
normal velocity.
velocity of propagation.
group velocity.
phase velocity.
Answer
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Electromagnetic Field Theory
A negative point charge q = - 40 nC is moving with velocity of 6 × 106 m/s in a direction specited by unit vector uy + 0.6 uz. Find the magnitude of force vector on the moving particle by the field B = 2 ux + 3 uy + 5 uz mT and E = 2 ux - 3 uy + 5 uz KV/m
244 μN.
144 μN.
1440 μN.
1144 μN.
244 μN.
144 μN.
1440 μN.
1144 μN.
Answer
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Electromagnetic Field Theory
A conductor is rotating with in a magnetic field. At which of the positions do the peak voltages occur?
Along the axis of the magnetic field.
Anywhere.
At an angle of 45° to the axis of the magnetic field.
At right angles to the axis of the magnetic field.
Along the axis of the magnetic field.
Anywhere.
At an angle of 45° to the axis of the magnetic field.
At right angles to the axis of the magnetic field.
Answer
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Electromagnetic Field Theory
In a perfect conductor the incident and reflected wave combine to produce
A stronger incident wave
A standing wave which is not progressing
A stronger reflected wave
None of these
A stronger incident wave
A standing wave which is not progressing
A stronger reflected wave
None of these
Answer
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